Code quality improvements.

Author: michaelnebel

csharp/ql/lib/semmle/code/csharp/dataflow/internal/FlowSummaryImpl.qll

@@ -18,7 +18,7 @@ module Input implements InputSig<Location, DataFlowImplSpecific::CsharpDataFlow>
 
   predicate neutralElement(SummarizedCallableBase c, string kind, string provenance, boolean isExact) {
     interpretNeutral(c, kind, provenance) and
-    // isExact has not been implemented yet.
+    // isExact is not needed for C#.
     isExact = false
   }
 

go/ql/lib/semmle/go/dataflow/internal/FlowSummaryImpl.qll

@@ -30,7 +30,7 @@ module Input implements InputSig<Location, DataFlowImplSpecific::GoDataFlow> {
       neutralModel(namespace, type, name, signature, kind, provenance) and
       c.asFunction() = interpretElement(namespace, type, false, name, signature, "").asEntity()
     ) and
-    // isExact has not been implemented yet.
+    // isExact is not needed for Go.
     isExact = false
   }
 
@@ -315,7 +315,7 @@ module Private {
      * and with provenance `provenance`.
      */
     predicate neutralElement(Input::SummarizedCallableBase c, string kind, string provenance) {
-      Input::neutralElement(c, kind, provenance, false)
+      Input::neutralElement(c, kind, provenance, _)
     }
   }
 

java/ql/lib/semmle/code/java/dataflow/internal/DataFlowDispatch.qll

@@ -1,7 +1,6 @@
 private import java
 private import DataFlowPrivate
 private import DataFlowUtil
-private import semmle.code.java.dataflow.ExternalFlow as ExternalFlow
 private import semmle.code.java.dataflow.InstanceAccess
 private import semmle.code.java.dataflow.internal.FlowSummaryImpl as Impl
 private import semmle.code.java.dispatch.VirtualDispatch as VirtualDispatch

java/ql/test/utils/modelgenerator/dataflow/p/Sinks.java

@@ -21,8 +21,7 @@ public void sink(Object o) {}
   // neutral=p;Sinks;sink2;(Object);summary;df-generated
   public void sink2(Object o) {}
 
-  // Defined as sink neutral file in the model file next to the
-  // neutral test.
+  // Defined as sink neutral in the file next to the neutral summary test.
   // neutral=p;Sinks;nosink;(Object);summary;df-generated
   public void nosink(Object o) {}